Beaumont Castle was a medieval castle in Mixbury, Oxfordshire, England, located at .

History Beaumont Castle was a possible motte and bailey or ringwork castle built in the village of Mixbury, Oxfordshire, England. The castle was probably built by Roger d'Ivry following the Norman invasion of England.Parishes: Mixbury, A History of the County of Oxford: Volume 6 (1959), pp. 251-262; accessed 11 June 2011. The castle was probably called Beaumont because it occupied a natural promontory overlooking a local stream. The castle was abandoned before 1216. Private excavations by two brothers from London in 1954–5 allegedly revealed a dungeon and an underground passage, although this discovery is disputed by scholars.Parishes: Mixbury, A History of the County of Oxford: Volume 6 (1959), pp. 251-262; accessed 11 June 2011; Beaumont Castle , English Heritage, accessed 11 June 2011. The site is registered as a scheduled monument.

See also Castles in Great Britain and Ireland List of castles in England

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